Paper roll braking device



Jilly 1936. H. A. w. WOOD PAPER ROLL BRAKING DEVICE 5 Sheets-Sheet 1Filed Feb. 5, 19:51

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y 1936. H. A. w. WOOD PAPER ROLL BRAKING DEVICE Filed Feb. 3, 1951SSheets-Shee-t 2 July 28, 1936. H A w W D 2,048,764

PAPER ROL Patented July 28, 1936 PAPER ROLL BRAKING DEVICE Henry A. WiseWood, New York, N. Y., assignor to Wood Newspaper Machinery Corporation,New York, N. Y., a. corporation of Virginia Application February 3,1931, Serial No. 513,119

Claims.

This invention relates to a device for braking and slowing down therotation of a heavy roll and is particularly adapted for use inconnection with the web rolls supplying Paper to a newspaper printingmachine.

The principal objects of the invention are to provide a combination ofretarding forces for stoppingone of these rolls when the press israpidly decelerating, one device applying the normal tension throughtension members operating against the circumference of the roll forretarding and the other applying a retarding effect against the centralaxis of the roll; to provide these two forces in such a manner that theycan be used simultaneously if desired, or either one alone, according tothe size of the roll and speed of operation, and to provide for theoperation of both of them in order to avoid injuring the surface of theroll by the application of too much tension or pressure directly on thesurface thereof. It will be seen therefore that two controls are used,one depending for its efiectiveness directly on the size and rapidity ofrotation of the roll itself and the other being controlled by the speedof the press.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which Fig. 1 isa side view, partially in section, of a support for paper rolls havingmeans for applying the brake to the center of the spindle;

Fig. 2 is an end view showing the part of the reel and the mechanism forapplying the brake above mentioned;

Fig. 3 is an end view of a means for applying a separate brake to theouter surface of the roll to cooperate with the other device, and

Fig. 4 is a wiring diagram;

In large newspaper-printing presses the control of the heavy rollspresents a serious problem on account of the fast acceleration ordeceleration of the press. In cases of emergency it is necessary to stopthe press quite suddenly and it is desirable to have the paper rollsstopped in the same manner so that too much tension will not be appliedto them, thus breaking the web, or too little tension, thus causing apaper flood.

It is customary to control the normal tension on the roll while thepress is running by straps or belts engaging the surface of the runningroll. This is found not to be sufiicient toslow down the roll as thepress is decelerating and the amount of retardation of the roll is notdirectly dependcut on the changing speed of the press. By the presentinvention this braking by means of the tension belts is retained andcombined with the braking of the running web roll by the application ofa retarding efiect to it through its central axis directly controlled bythe speed of the, ress.

The invention is shown as applied to a well known type of constructionin which a pair of pedestals Ill support the opposite sides of a reel ll rotatable on a shaft 25 carried by the pedestals. 10

In the present case the reel comprises three pairs of arms I3 forming aspider at each end and supporting three web rolls l2. As is wellunderstood, this reel is adapted to be rotated to. bring the proper webroll into position to attach it to the expiring web. The details of theoperating mechanism for the reel are not shown as any that are on themarket can be used with this invention. One of these pedestals is madeadjustable to and from the other to accommodate different lengths ofpaper roll.

As shown in Fig. 3, the running roll has tension applied to it at alltimes by tension belts or straps I, each having one end fixed and theother pulled taut through levers 8 and removable adjustablecounterweights 9. In addition to the adjustment of the retarding effect,applied to the outer surface of the roll on removing or adding weights,variationcan be provided by turning the reel. Thus the roll being usedwill bear on these straps with more or less pressure.

On a stationary plate 6. supported by the hub of the reel is a hollowbracket I4 extending upwardlyand provided at its upper end with abearing for a longitudinal shaft 15. This shaft 35 is supported by thetwo brackets M at opposite ends of the reel and is connected, by meansnot shown, with the press so as to rotate at a certain definite ratiowith respect to the speed of the press. This shaft is provided with acollar l6 mounted in the bracket 14 and splined to the shaft is a bevelgear l'l held by this collar. This construction allows longitudinalmotion of the bracket [4 and bevel gear with it for adjusting the paperreel for side register or for moving the 45 pedestal in and out fordifierent widths of rolls.

The bevel gear I! operates a second bevel gear l8 on a vertical shaft l9which by a pair of bevel gears 2!! drives a longitudinal shaft 2|. Onthis shaft 2| is a pinion 22 meshing with a gear 23. This gear 23 isbolted to a gear 24 and both are concentric with the central shaft 25 ofthe reel and are mounted to rotate on bearings carried by the spider l3which make up one end of the reel. With the gear 24 mesh three gears 55clutch 30.

26, one on each arm of the reel. Each of these gears 26 is provided witha spring friction disc 21 secured to it.

It will be understood that each of the three paper rolls carried by thereel is mounted at each end on a stud carried by a spindle 28. Thisspindle is mounted on ball bearings in the spider and has secured to ita spacer 29 and a magnetic A washer 3| and jam nut 32 on the end of theshaft 28 secure the magnetic clutch in position.

It will be obvious that the shaft 28 rotates with the web roll and thatthe gear 26 rotates accurately in proportion to the speedof the press.

The gearing is designed so that the gear 26 will rotate slower than thespindle 28 duringthe normal operation of the press. Now if the magneticclutch 30 is energized a friction connection is made between the clutchand friction disc 21, one being secured to the shaft and the other tothe gear. This exerts a retarding effect on the spindle 28 and thereforeon the roll which is carried by it.

A casing M is provided around the gears I! and I8 and a casing M for thegears 28. These casings are both a part of the bracket M. The hub of thespider i3 is extended out around the gearing to form an enclosuretherefor so that all the gearing on the reel is enclosed.

These tension straps 1 constitute by themselves sufficient retardingeffect to control the rolls on sudden stops of the press when the rollsare small, but not when they are large. Therefore, it is desirable tohave the added retardation acting through the axis of the roll only whenthe roll is of large diameter. This cooperation of these tworetardingdevices could be arranged in accordance with this inventionautomatically but a simple embodiment is shown, in the first threefigures, whereby the reel operator keeps his running rollabove thecenter on the belts 1 until such time as the roll is decreasedsufficiently in size so that the action of the straps 1 will besufficient to do all the stopping necessary. After this the reel isrotated under hand control so that the roll is placed below the center.In this case the stopping of the press does not supply retardationthrough the central axis of the roll but the tension straps l are reliedon alone.

This is taken care of by the use of a series of segments 35, one foreach of the three spindles. Thus the retardation will be selective ofthe roll which is being operated. The segments 35 are mounted on aninsulated ring 36 along with a contact ring 31, the whole being securedto rotatewith the'spider ll. Each segment 35 is connected with a brush38 during that period of operation when'its roll is large and is locatedabove the center in Fig. 3. The ring 31, through a brush 39, isconnected as shown in the diagram, Fig. 4, to bring power into one sideof the magnetic clutch 30. The other side of the magnetic clutch isconnected with the power when the brush 38 cooperates with the properone of the segments 35. The press-control board is so operated that thebraking of the press is severe. This, as shown here, is a sort of handoperation because the reel man controls the turning of the reel by handto set it below the center at the proper time, at which time theconnections to the magnet clutch 3!! are broken and this part of themechanism isno longer relied upon.

In Fig. 4 other features are shown, whereby the braking is done by adynamic circuit 40 on the motor. Connected in parallel with the brakingresistance 4| is a coil 42 which controls a contact 43 to close acircuit from the line through the contact brush 38. It is apparenttherefore that if the contacts are made both by one of the segments 35and brush 38 and also the coil 42 is energized so that the contacts 43are closed, a retardation is exerted on the running roll at its axis.

I have shown the magnetic clutch 30 as rotatl0 able with the rollspindle 28 but from that I do not wishit understood that the inventionis limited to this particular feature, except as expressed in theclaims. This magnetic clutch could be made stationary and would impartretardation 15 to the roll spindle when the clutch was energized. It isobvious therefore that a modification of the arrangement described couldbe made acting through the axis of the web roll but with a stationarymagnetic clutch instead of a rotatable one. As the drawings do not showwhether this clutch is rotatable or stationary it is thought thatanother illustration of it showing it stationary would not add to thedisclosure and such an illustration is not provided therefore.

It will be seen from the above that a combination of forces is appliedfor controlling the proper deceleration of the web roll. The usualapplication of friction to the surface of the roll is employed and isused by itself when the roll reaches 30 a small enough diameter.However, when the roll is of large diameter this retardation is notsufiicient and is amplified by the retardation through the central axisof the roll as described. Thus I have a combination of retarding forces35 when the press is rapidly decelerated and running a large roll.

Although I have illustrated and described only two forms of theinvention I am aware of the fact that other modifications can be madetherein by any person skilled in the art without departing from thescope of the invention as expressed in the claims. Therefore, I do notwish to be limited in this respect but what I do claim is:-

1. The combination withmeans for supporting a web roll in position tosupply the web to a printing press, and means for retarding the speed ofthe web roll by action on its surface, of a wheel concentric with theweb roll, means connected to rotate said wheel at a definite ratio tothe speed of the press and normally at a speed less than that of the webroll, and means, fixed to rotate exactly with the web roll, for tendingto bring the speed of the web roll down to that of said wheel.

2. The combination with means for supporting a web roll in position tosupply the web to a printing press, and means for retarding the speed ofthe web roll by action on its surface, of a wheel concentric with theweb roll, means connected to rotate said wheel at a definite ratio tothe speed of the press and normally at a speed less than that of the webroll, and means acting through the axis of the web roll for slowing downthe web roll to rotate at the speed of said wheel.

3. In a web roll braking device, the combination of a shaft rotated froma printing press,

a web roll spindle, a gear running loosely on the web roll spindle,means connected with said shaft for rotating said gear at a speed lessthan that of the spindle, and a magnetic clutch adjacent the spindle forslowing down the spindle to the speed of said gear.

a. In a web roll braking device, the combination of a reel, a web rolland its spindle rotatably supported thereon, a magnetic clutch securedto the spindle to rotate therewith, a gear rotatably mounted on thespindle, a friction disc secured to the gear to rotate therewith andlocated in position to be held by the clutch when energized, whereby theclutch at that time will tend to bring the rotation of the web roll intosynchronism with that of the gear, and means connected with a press towhich the web roll supplies paper for rotating the gear in proportion tothe speed of the press and at a speed less than that of the roll.

5. The combination with means for supporting a web roll in position tosupply the web to a printing press, and means for retarding the speed ofthe web roll by action on its surface, of a wheel concentric with theweb roll, means connected to rotate said wheel at a definite ratio tothe speed of the press and normally at a speed less than that of the webroll, means acting through the axis of the web roll for slowing down theweb roll to rotate at the speed of said wheel, and means whereby whenthe web roll is moved beyond a predetermined point, the last named meanswill be thrown out of action.

6. In a web supply device for a printing press, the combination With arotary reel having means thereon for supporting a plurality of webrolls, each adapted to come into position to deliver the running web tothe press, at a certain point in the circle through which the reelrotates, means for applying tension to the surface of the running rollso located that the tension can be changed by the turning of the reelwith the roll thereon, means for applying a braking action at the centerof the web roll controlled by and dependent upon the speed of the press,and means whereby any roll on the reel will come under the influence ofthe last named means in accordance with the rotation of the reel.

7. The combination of a bodily movable web roll, means for rotating iton its own axis, means for bodily moving said roll tension means inposition for engaging the surface of said roll when it moves intorunning position, a clutch, and 5 means for operating said clutch toapply a force to resist the rotation of the roll while said tensionmeans is in contact with said roll.

8. The combination with means for supporting a web roll in position tosupply the web to a printing press, of means for applying retardation tothe web roll on its surface, and means operated from a printing pressfor applying retardation to the web roll through its central axis whenthe press is decelerated.

9. In a web-splicing device, the combination of two tensioning devicesfor a web roll, means whereby one exerts its retarding force on thecircumference of the roll and means whereby the other exerts itsretarding force through the axis of said roll, of means whereby thecontrol of the web roll by the first tensioning device is progressivelyincreased as the roll moves bodily toward running position and the otheris applied during that period.

10. The combination with means for supporting a web roll in position tosupply the web to a printing press and tension straps for applyingnormal tension to the running roll by action on its surface, of a wheelconcentric with the running roll, means connected to rotate said Wheelat a speed in definite ratio to the speed of the press and normally at aspeed less than that of the web, a magnetic clutch fixed to rotateexactly with the running roll when the press is being slowed down, andmeans whereby said clutch will tend to bring the speed of the runningroll down to that of said wheel.

HENRY A. WISE WOOD.

